[deliverable/linux.git] / drivers / net / wireless / marvell / mwifiex / sta_tx.c

/*
 * Marvell Wireless LAN device driver: station TX data handling
 *
 * Copyright (C) 2011-2014, Marvell International Ltd.
 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available by writing to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 */

#include "decl.h"
#include "ioctl.h"
#include "util.h"
#include "fw.h"
#include "main.h"
#include "wmm.h"

/*
 * This function fills the TxPD for tx packets.
 *
 * The Tx buffer received by this function should already have the
 * header space allocated for TxPD.
 *
 * This function inserts the TxPD in between interface header and actual
 * data and adjusts the buffer pointers accordingly.
 *
 * The following TxPD fields are set by this function, as required -
 *      - BSS number
 *      - Tx packet length and offset
 *      - Priority
 *      - Packet delay
 *      - Priority specific Tx control
 *      - Flags
 */
void *mwifiex_process_sta_txpd(struct mwifiex_private *priv,
				struct sk_buff *skb)
{
	struct mwifiex_adapter *adapter = priv->adapter;
	struct txpd *local_tx_pd;
	struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
	unsigned int pad;
	u16 pkt_type, pkt_offset;
	int hroom = (priv->adapter->iface_type == MWIFIEX_USB) ? 0 :
		       INTF_HEADER_LEN;

	if (!skb->len) {
		mwifiex_dbg(adapter, ERROR,
			    "Tx: bad packet length: %d\n", skb->len);
		tx_info->status_code = -1;
		return skb->data;
	}

	BUG_ON(skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN);

	pkt_type = mwifiex_is_skb_mgmt_frame(skb) ? PKT_TYPE_MGMT : 0;

	pad = ((void *)skb->data - (sizeof(*local_tx_pd) + hroom)-
			 NULL) & (MWIFIEX_DMA_ALIGN_SZ - 1);
	skb_push(skb, sizeof(*local_tx_pd) + pad);

	local_tx_pd = (struct txpd *) skb->data;
	memset(local_tx_pd, 0, sizeof(struct txpd));
	local_tx_pd->bss_num = priv->bss_num;
	local_tx_pd->bss_type = priv->bss_type;
	local_tx_pd->tx_pkt_length = cpu_to_le16((u16)(skb->len -
						       (sizeof(struct txpd) +
							pad)));

	local_tx_pd->priority = (u8) skb->priority;
	local_tx_pd->pkt_delay_2ms =
				mwifiex_wmm_compute_drv_pkt_delay(priv, skb);

	if (tx_info->flags & MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS ||
	    tx_info->flags & MWIFIEX_BUF_FLAG_ACTION_TX_STATUS) {
		local_tx_pd->tx_token_id = tx_info->ack_frame_id;
		local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_REQ_TX_STATUS;
	}

	if (local_tx_pd->priority <
	    ARRAY_SIZE(priv->wmm.user_pri_pkt_tx_ctrl))
		/*
		 * Set the priority specific tx_control field, setting of 0 will
		 *   cause the default value to be used later in this function
		 */
		local_tx_pd->tx_control =
			cpu_to_le32(priv->wmm.user_pri_pkt_tx_ctrl[local_tx_pd->
								   priority]);

	if (adapter->pps_uapsd_mode) {
		if (mwifiex_check_last_packet_indication(priv)) {
			adapter->tx_lock_flag = true;
			local_tx_pd->flags =
				MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET;
		}
	}

	if (tx_info->flags & MWIFIEX_BUF_FLAG_TDLS_PKT)
		local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_TDLS_PACKET;

	/* Offset of actual data */
	pkt_offset = sizeof(struct txpd) + pad;
	if (pkt_type == PKT_TYPE_MGMT) {
		/* Set the packet type and add header for management frame */
		local_tx_pd->tx_pkt_type = cpu_to_le16(pkt_type);
		pkt_offset += MWIFIEX_MGMT_FRAME_HEADER_SIZE;
	}

	local_tx_pd->tx_pkt_offset = cpu_to_le16(pkt_offset);

	/* make space for INTF_HEADER_LEN */
	skb_push(skb, hroom);

	if (!local_tx_pd->tx_control)
		/* TxCtrl set by user or default */
		local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);

	return skb->data;
}

/*
 * This function tells firmware to send a NULL data packet.
 *
 * The function creates a NULL data packet with TxPD and sends to the
 * firmware for transmission, with highest priority setting.
 */
int mwifiex_send_null_packet(struct mwifiex_private *priv, u8 flags)
{
	struct mwifiex_adapter *adapter = priv->adapter;
	struct txpd *local_tx_pd;
	struct mwifiex_tx_param tx_param;
/* sizeof(struct txpd) + Interface specific header */
#define NULL_PACKET_HDR 64
	u32 data_len = NULL_PACKET_HDR;
	struct sk_buff *skb;
	int ret;
	struct mwifiex_txinfo *tx_info = NULL;

	if (adapter->surprise_removed)
		return -1;

	if (!priv->media_connected)
		return -1;

	if (adapter->data_sent)
		return -1;

	if (adapter->if_ops.is_port_ready &&
	    !adapter->if_ops.is_port_ready(priv))
		return -1;

	skb = dev_alloc_skb(data_len);
	if (!skb)
		return -1;

	tx_info = MWIFIEX_SKB_TXCB(skb);
	memset(tx_info, 0, sizeof(*tx_info));
	tx_info->bss_num = priv->bss_num;
	tx_info->bss_type = priv->bss_type;
	tx_info->pkt_len = data_len - (sizeof(struct txpd) + INTF_HEADER_LEN);
	skb_reserve(skb, sizeof(struct txpd) + INTF_HEADER_LEN);
	skb_push(skb, sizeof(struct txpd));

	local_tx_pd = (struct txpd *) skb->data;
	local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
	local_tx_pd->flags = flags;
	local_tx_pd->priority = WMM_HIGHEST_PRIORITY;
	local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd));
	local_tx_pd->bss_num = priv->bss_num;
	local_tx_pd->bss_type = priv->bss_type;

	if (adapter->iface_type == MWIFIEX_USB) {
		ret = adapter->if_ops.host_to_card(adapter, priv->usb_port,
						   skb, NULL);
	} else {
		skb_push(skb, INTF_HEADER_LEN);
		tx_param.next_pkt_len = 0;
		ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
						   skb, &tx_param);
	}
	switch (ret) {
	case -EBUSY:
		dev_kfree_skb_any(skb);
		mwifiex_dbg(adapter, ERROR,
			    "%s: host_to_card failed: ret=%d\n",
			    __func__, ret);
		adapter->dbg.num_tx_host_to_card_failure++;
		break;
	case -1:
		dev_kfree_skb_any(skb);
		mwifiex_dbg(adapter, ERROR,
			    "%s: host_to_card failed: ret=%d\n",
			    __func__, ret);
		adapter->dbg.num_tx_host_to_card_failure++;
		break;
	case 0:
		dev_kfree_skb_any(skb);
		mwifiex_dbg(adapter, DATA,
			    "data: %s: host_to_card succeeded\n",
			    __func__);
		adapter->tx_lock_flag = true;
		break;
	case -EINPROGRESS:
		adapter->tx_lock_flag = true;
		break;
	default:
		break;
	}

	return ret;
}

/*
 * This function checks if we need to send last packet indication.
 */
u8
mwifiex_check_last_packet_indication(struct mwifiex_private *priv)
{
	struct mwifiex_adapter *adapter = priv->adapter;
	u8 ret = false;

	if (!adapter->sleep_period.period)
		return ret;
	if (mwifiex_wmm_lists_empty(adapter))
			ret = true;

	if (ret && !adapter->cmd_sent && !adapter->curr_cmd &&
	    !is_command_pending(adapter)) {
		adapter->delay_null_pkt = false;
		ret = true;
	} else {
		ret = false;
		adapter->delay_null_pkt = true;
	}
	return ret;
}
Commit	Line	Data
5e6e3a92 BZ	1	/*
	2	* Marvell Wireless LAN device driver: station TX data handling
	3	*
65da33f5	4	* Copyright (C) 2011-2014, Marvell International Ltd.
5e6e3a92 BZ	5	*
	6	* This software file (the "File") is distributed by Marvell International
	7	* Ltd. under the terms of the GNU General Public License Version 2, June 1991
	8	* (the "License"). You may use, redistribute and/or modify this File in
	9	* accordance with the terms and conditions of the License, a copy of which
	10	* is available by writing to the Free Software Foundation, Inc.,
	11	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
	12	* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
	13	*
	14	* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
	15	* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
	16	* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
	17	* this warranty disclaimer.
	18	*/
	19
	20	#include "decl.h"
	21	#include "ioctl.h"
	22	#include "util.h"
	23	#include "fw.h"
	24	#include "main.h"
	25	#include "wmm.h"
	26
	27	/*
	28	* This function fills the TxPD for tx packets.
	29	*
	30	* The Tx buffer received by this function should already have the
	31	* header space allocated for TxPD.
	32	*
	33	* This function inserts the TxPD in between interface header and actual
	34	* data and adjusts the buffer pointers accordingly.
	35	*
	36	* The following TxPD fields are set by this function, as required -
	37	* - BSS number
	38	* - Tx packet length and offset
	39	* - Priority
	40	* - Packet delay
	41	* - Priority specific Tx control
	42	* - Flags
	43	*/
	44	void mwifiex_process_sta_txpd(struct mwifiex_private priv,
	45	struct sk_buff *skb)
	46	{
	47	struct mwifiex_adapter *adapter = priv->adapter;
	48	struct txpd *local_tx_pd;
	49	struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
84b313b3	50	unsigned int pad;
e39faa73	51	u16 pkt_type, pkt_offset;
84b313b3 XH	52	int hroom = (priv->adapter->iface_type == MWIFIEX_USB) ? 0 :
84b313b3 XH	53	INTF_HEADER_LEN;
5e6e3a92 BZ	54
5e6e3a92 BZ	55	if (!skb->len) {
acebe8c1 ZL	56	mwifiex_dbg(adapter, ERROR,
acebe8c1 ZL	57	"Tx: bad packet length: %d\n", skb->len);
600f5d90	58	tx_info->status_code = -1;
5e6e3a92 BZ	59	return skb->data;
	60	}
	61
84b313b3	62	BUG_ON(skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN);
e39faa73	63
84b313b3	64	pkt_type = mwifiex_is_skb_mgmt_frame(skb) ? PKT_TYPE_MGMT : 0;
e156103c	65
84b313b3 XH	66	pad = ((void )skb->data - (sizeof(local_tx_pd) + hroom)-
84b313b3 XH	67	NULL) & (MWIFIEX_DMA_ALIGN_SZ - 1);
e156103c	68	skb_push(skb, sizeof(*local_tx_pd) + pad);
5e6e3a92 BZ	69
	70	local_tx_pd = (struct txpd *) skb->data;
	71	memset(local_tx_pd, 0, sizeof(struct txpd));
	72	local_tx_pd->bss_num = priv->bss_num;
	73	local_tx_pd->bss_type = priv->bss_type;
c65a30f3	74	local_tx_pd->tx_pkt_length = cpu_to_le16((u16)(skb->len -
84b313b3 XH	75	(sizeof(struct txpd) +
84b313b3 XH	76	pad)));
5e6e3a92 BZ	77
	78	local_tx_pd->priority = (u8) skb->priority;
	79	local_tx_pd->pkt_delay_2ms =
c65a30f3	80	mwifiex_wmm_compute_drv_pkt_delay(priv, skb);
5e6e3a92	81
18ca4382 AK	82	if (tx_info->flags & MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS \|\|
18ca4382 AK	83	tx_info->flags & MWIFIEX_BUF_FLAG_ACTION_TX_STATUS) {
808bbebc AK	84	local_tx_pd->tx_token_id = tx_info->ack_frame_id;
	85	local_tx_pd->flags \|= MWIFIEX_TXPD_FLAGS_REQ_TX_STATUS;
	86	}
	87
5e6e3a92 BZ	88	if (local_tx_pd->priority <
	89	ARRAY_SIZE(priv->wmm.user_pri_pkt_tx_ctrl))
	90	/*
	91	* Set the priority specific tx_control field, setting of 0 will
	92	* cause the default value to be used later in this function
	93	*/
	94	local_tx_pd->tx_control =
	95	cpu_to_le32(priv->wmm.user_pri_pkt_tx_ctrl[local_tx_pd->
c65a30f3	96	priority]);
5e6e3a92 BZ	97
	98	if (adapter->pps_uapsd_mode) {
	99	if (mwifiex_check_last_packet_indication(priv)) {
	100	adapter->tx_lock_flag = true;
	101	local_tx_pd->flags =
	102	MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET;
	103	}
	104	}
	105
b23bce29 AP	106	if (tx_info->flags & MWIFIEX_BUF_FLAG_TDLS_PKT)
	107	local_tx_pd->flags \|= MWIFIEX_TXPD_FLAGS_TDLS_PACKET;
	108
5e6e3a92	109	/* Offset of actual data */
e39faa73 SP	110	pkt_offset = sizeof(struct txpd) + pad;
	111	if (pkt_type == PKT_TYPE_MGMT) {
	112	/* Set the packet type and add header for management frame */
	113	local_tx_pd->tx_pkt_type = cpu_to_le16(pkt_type);
	114	pkt_offset += MWIFIEX_MGMT_FRAME_HEADER_SIZE;
	115	}
	116
	117	local_tx_pd->tx_pkt_offset = cpu_to_le16(pkt_offset);
5e6e3a92 BZ	118
5e6e3a92 BZ	119	/* make space for INTF_HEADER_LEN */
84b313b3	120	skb_push(skb, hroom);
5e6e3a92 BZ	121
	122	if (!local_tx_pd->tx_control)
	123	/* TxCtrl set by user or default */
	124	local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
	125
	126	return skb->data;
	127	}
	128
	129	/*
	130	* This function tells firmware to send a NULL data packet.
	131	*
	132	* The function creates a NULL data packet with TxPD and sends to the
	133	* firmware for transmission, with highest priority setting.
	134	*/
	135	int mwifiex_send_null_packet(struct mwifiex_private *priv, u8 flags)
	136	{
	137	struct mwifiex_adapter *adapter = priv->adapter;
	138	struct txpd *local_tx_pd;
8d767dcb	139	struct mwifiex_tx_param tx_param;
5e6e3a92 BZ	140	/* sizeof(struct txpd) + Interface specific header */
	141	#define NULL_PACKET_HDR 64
	142	u32 data_len = NULL_PACKET_HDR;
270e58e8 YAP	143	struct sk_buff *skb;
270e58e8 YAP	144	int ret;
5e6e3a92 BZ	145	struct mwifiex_txinfo *tx_info = NULL;
	146
	147	if (adapter->surprise_removed)
	148	return -1;
	149
	150	if (!priv->media_connected)
	151	return -1;
	152
	153	if (adapter->data_sent)
	154	return -1;
	155
735ab6bf ZL	156	if (adapter->if_ops.is_port_ready &&
	157	!adapter->if_ops.is_port_ready(priv))
	158	return -1;
	159
5e6e3a92 BZ	160	skb = dev_alloc_skb(data_len);
	161	if (!skb)
	162	return -1;
	163
	164	tx_info = MWIFIEX_SKB_TXCB(skb);
701a9e61	165	memset(tx_info, 0, sizeof(*tx_info));
9da9a3b2 YAP	166	tx_info->bss_num = priv->bss_num;
9da9a3b2 YAP	167	tx_info->bss_type = priv->bss_type;
a1ed4849	168	tx_info->pkt_len = data_len - (sizeof(struct txpd) + INTF_HEADER_LEN);
5e6e3a92 BZ	169	skb_reserve(skb, sizeof(struct txpd) + INTF_HEADER_LEN);
	170	skb_push(skb, sizeof(struct txpd));
	171
	172	local_tx_pd = (struct txpd *) skb->data;
	173	local_tx_pd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
	174	local_tx_pd->flags = flags;
	175	local_tx_pd->priority = WMM_HIGHEST_PRIORITY;
	176	local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd));
	177	local_tx_pd->bss_num = priv->bss_num;
	178	local_tx_pd->bss_type = priv->bss_type;
	179
4daffe35	180	if (adapter->iface_type == MWIFIEX_USB) {
735ab6bf	181	ret = adapter->if_ops.host_to_card(adapter, priv->usb_port,
4daffe35 AK	182	skb, NULL);
	183	} else {
	184	skb_push(skb, INTF_HEADER_LEN);
8d767dcb	185	tx_param.next_pkt_len = 0;
4daffe35	186	ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
8d767dcb	187	skb, &tx_param);
4daffe35	188	}
5e6e3a92 BZ	189	switch (ret) {
5e6e3a92 BZ	190	case -EBUSY:
0ea3186c	191	dev_kfree_skb_any(skb);
acebe8c1 ZL	192	mwifiex_dbg(adapter, ERROR,
	193	"%s: host_to_card failed: ret=%d\n",
	194	__func__, ret);
0ea3186c AK	195	adapter->dbg.num_tx_host_to_card_failure++;
0ea3186c AK	196	break;
5e6e3a92 BZ	197	case -1:
5e6e3a92 BZ	198	dev_kfree_skb_any(skb);
acebe8c1 ZL	199	mwifiex_dbg(adapter, ERROR,
	200	"%s: host_to_card failed: ret=%d\n",
	201	__func__, ret);
5e6e3a92 BZ	202	adapter->dbg.num_tx_host_to_card_failure++;
	203	break;
	204	case 0:
	205	dev_kfree_skb_any(skb);
acebe8c1 ZL	206	mwifiex_dbg(adapter, DATA,
	207	"data: %s: host_to_card succeeded\n",
	208	__func__);
5e6e3a92 BZ	209	adapter->tx_lock_flag = true;
	210	break;
	211	case -EINPROGRESS:
0ea3186c	212	adapter->tx_lock_flag = true;
5e6e3a92 BZ	213	break;
	214	default:
	215	break;
	216	}
	217
	218	return ret;
	219	}
	220
	221	/*
	222	* This function checks if we need to send last packet indication.
	223	*/
	224	u8
	225	mwifiex_check_last_packet_indication(struct mwifiex_private *priv)
	226	{
	227	struct mwifiex_adapter *adapter = priv->adapter;
	228	u8 ret = false;
5e6e3a92 BZ	229
	230	if (!adapter->sleep_period.period)
	231	return ret;
636c4598	232	if (mwifiex_wmm_lists_empty(adapter))
5e6e3a92	233	ret = true;
5e6e3a92	234
c65a30f3 YAP	235	if (ret && !adapter->cmd_sent && !adapter->curr_cmd &&
c65a30f3 YAP	236	!is_command_pending(adapter)) {
5e6e3a92 BZ	237	adapter->delay_null_pkt = false;
	238	ret = true;
	239	} else {
	240	ret = false;
	241	adapter->delay_null_pkt = true;
	242	}
	243	return ret;
	244	}